structs overloading ?

[onion]

Hi,

May I ask for some help here please? I'm new to C++. I just tried googling but after a day I still can't solve my problem.

I have these structs declaration:

struct IF {
        string condition
};

struct Stmt {
	IF ifStat;
};

struct StmtLst {
        vector<Stmt> stmt;
}

struct IF {
	string condition;
	StmtLst thenPart;
        StmtLst elsePart;
};

Is it possible to overload a struct declaration?

Initially I wanted to declare just the 2nd IF struct but I can't because I had to declare it after the StmtLst struct.

But at the same time I have to declare the IF struct before the Stmt struct. and the Stmt must be before the StmtLst struct.

I tried using friend, union but to no avail.

I'm going crazy :( Please direct me the right way to deal with this. Thanks alot!!

[Bazzy]

You need to forward declare a class.
Notice that you can't have two classes holding complete objects of each other or it will require infinite memory
eg:
Stmt has an IF object which has (at least) a Stmt object which has an IF object ...
You need to use references or pointers

[onion]

Can I do like this?

struct IF IF;

struct Stmt {
	IF ifStat;
};

struct StmtLst {
        vector<Stmt> stmt;
}

struct IF {
	string condition;
	StmtLst thenPart;
        StmtLst elsePart;
};

How can I use pointers in here? Is it struct *mystruct;

mystruct { ... };

??

Thanks!